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Property and equipment, net | 12 Months Ended
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Dec. 31, 2022
Property, Plant and Equipment [Abstract] |
Property and equipment, net |
| 17. | Property and equipment, net
Property and equipment consist of the following:
(In thousands) |  | December 31, 2021 |  |  | December 31, 2022 |
Computers |  |  | 672 |  |  |  | 460 |
Server & switch |  |  | 1,382 |  |  |  | 1,283 |
Office equipment |  |  | 1,685 |  |  |  | 1,754 |
Wi-Fi terminals for data connectivity services |  |  | 9,632 |  |  |  | 7,762 |
Leasehold improvement |  |  | 589 |  |  |  | 536 |
Total original costs |  |  | 13,960 |  |  |  | 11,795 |
Less: accumulated depreciation |  |  | (12,164 | ) |  |  | (10,614 | )
Net book value |  |  | 1,796 |  |  |  | 1,181 |
Depreciation expenses recognized for the years ended December 31, 2020, 2021 and 2022 were US$2,174 thousand, US$2,022 thousand and US$839 thousand, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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